/Engine/Source/Runtime/Online/Experimental/EventLoop/Public/EventLoop/EventLoop.h
Thread safe.
handle to the registered timer.
virtual [FTimerHandle](API\Runtime\EventLoop\EventLoop\FTimerHandle) SetTimer ( [FTimerCallback](API\Runtime\EventLoop\EventLoop\FTimerCallback) && Callback, [FTimespan](API\Runtime\Core\Misc\FTimespan) InRate, bool InbRepeat, [TOptional](API\Runtime\Core\IO\TOptional)< [FTimespan](API\Runtime\Core\Misc\FTimespan) > InFirstDelay )